audit

I have been doing some thinking about my pass days in volunteering at the local cancer hospital at MD Anderson and Texas Children's hospital; i have started to possilby look into the nursing profession. I am currently soon to be graduating Accounting Business student. My academic concerns at the moment are but no limited to the following: (1)Do i need to retake some classes to qualify to get in to Nursing school? Or should I apply for the accelerated program? (2)A person whom I was talking to whom was accepted into nursing school told me the national board exam sometimes has a science section and others do not. Is this true? If so, should I forgo trying to take a test with a sciene section? Any effects if any on my admission application? (3)Also, when I apply for the school, I will be applying to become a RN and then apply again to specialize, right? I am confused how people become LVPN, CNA's, RN's, etc.... I thought everyone first become a RN. (4)There seems to be a lot of information. Anywhere I can go to straighten all the confusion for someone wanting to change gears? Thank You.